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Fresh Start Accounting - Changes in Accounts Payable (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Feb. 09, 2021
Reorganization, Chapter 11 [Line Items]      
Net impact to accounts payable $ 374 $ 308 $ 415
Reorganization Adjustments      
Reorganization, Chapter 11 [Line Items]      
Accrual of professional service provider success fees     38
Accrual of convenience claim distribution reserve     10
Accrual of professional service provider fees     5
Reinstatement of accounts payable from liabilities subject to compromise     2
Payment of professional fees     (31)
Net impact to accounts payable     $ 24